December Weather in Sandanski, Bulgaria

Last updated: August 21, 2025

Nestled in the picturesque landscape of Sandanski, December brings a unique blend of weather characteristics that paint a vivid picture of winter. With maximum temperatures reaching 14°C (58°F) and an average of 4°C (40°F), the month offers a mild chill, while nighttime can plunge to a brisk -6°C (22°F). This time of year is marked by 111 mm (4.4 in) of precipitation over approximately 12 days, creating a moist environment, accompanied by an average humidity level of 87%. Whether you're exploring the natural beauty or enjoying the local festivities, December in Sandanski offers a refreshing and invigorating experience venturing into the heart of winter.

December Temperature in Sandanski

In Sandanski, Bulgaria, December ushers in a cool chill as the year draws to a close. With temperatures ranging from a minimum of -6°C (22°F) to a maximum of 14°C (58°F), the average settles at a brisk 4°C (40°F). This month marks a transition from the mild autumn chill of November, where temperatures hovered around 9°C (48°F), showcasing a clear dip as winter sets in. As the days are shorter and nights grow colder, December's conditions begin to prepare the region for the colder depths of winter that follow in January. Embrace the seasonal change as Sandanski's landscapes transform into picturesque winter scenes, ready to enchant visitors with its charm.

December Weather in Sandanski: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sandanski, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sandanski, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec354045536268747567564739
Data source: Temperature data for Sandanski generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Sandanski

In December, Sandanski experiences a notable increase in precipitation, with 111 mm (4.4 in) recorded across 12 days—the highest monthly total of the year. This surge signals the transition into winter, contrasting sharply with the arid summer months of July and August, which see only a fraction of this rainfall. As the year closes, the city's weather becomes more dynamic, setting a reflective tone for the season and providing essential moisture that supports the lush landscapes typical of the region during the colder months. Despite the chill, December’s rainfall fosters a vibrant ecosystem, reinforcing the cyclical nature of Sandanski's climate.

December Precipitation Trends in Sandanski

The chart displays monthly precipitation patterns in Sandanski, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Sandanski, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec6865926973705031325676111
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sandanski

In December, Sandanski, Bulgaria experiences a notable increase in humidity, reaching 87%, which reflects a trend of elevated moisture levels as winter sets in. Following November’s 85%, this slight rise signifies the city's transition into the colder months; however, it remains significantly lower than the 88% recorded in January. The year unfolds a clear pattern: as the seasons shift, humidity generally decreases from the peak of 88% in January, hitting a low of 47% in August before gradually climbing back up in the latter months. December, with its high humidity levels, prepares the region for the chill of winter, making it an intriguing time for those who appreciate the cozy embrace of the season.

December Average Humidity in Sandanski

This chart illustrates the average monthly humidity levels in Sandanski, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Sandanski is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%83%81%71%74%63%60%47%57%76%85%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sandanski

As December rolls into Sandanski, Bulgaria, residents can breathe a sigh of relief with a low UV Index of 2, allowing for a comfortable exposure time of up to 45 minutes without the risk of sunburn. This marks a significant drop from the extreme levels experienced in the summer months, where the UV Index soared to 11 in June. As the year progresses from January to December, there’s a clear trend of increasing UV radiation, peaking in the warmer months and sharply declining as winter approaches. The shift in exposure categories—from very high in the spring and summer to a soothing low in December—highlights the seasonal variability that defines Sandanski's climate. For more insights on UV trends throughout the year, visit Sandanski UV Index.

Maximum UV Index Levels in Sandanski for December

The chart shows the monthly maximum UV Index (UVI) for Sandanski in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Sandanski typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec247810111098642
Data source: Sandanski December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Sandanski

December in Sandanski, Bulgaria, sees a moderate decline in sunshine hours, with 223 hours gracing the month. This is a notable reduction from the sun-kissed days of mid-year, where hours peaked at around 427 hours in July. As autumn transitions into winter, the sunshine begins its gentle retreat, dropping significantly from November’s 232 hours. Despite this decrease, December's bright days still offer a cozy ambiance, inviting visitors to embrace the crisp air amid a landscape bathed in winter light. As the year ends, the consistent pattern illustrates the region’s dynamic climate, with sunshine steadily waning after the summer months, yet remaining a charming feature of Sandanski’s winter charm.

Monthly Sunshine Duration in Sandanski: December Highlighted

The December sunshine duration represents the total number of hours Sandanski experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec185h239h298h341h400h401h427h399h346h295h232h223h
Data source: Sandanski December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sandanski During December

In December, Sandanski, Bulgaria, experiences a 42% chance of sunny weather, marking a notable shift as the year draws to a close. This percentage reflects a gradual decline from the sunniest summer months of July and August, which boast chances of sunshine at 75% and 77%, respectively. As autumn transitions into winter, the likelihood of sunny days dips, particularly with November's 32% offering. However, December's figures still provide a reasonable possibility for clear skies, indicating that while the winter chill sets in, there’s still potential for bright, sunny moments amid the colder months. This trend emphasizes the region's characteristic variability, making it an intriguing destination for those hoping to catch some winter sun.

Percentage of Sunny Days in December in Sandanski

The chart illustrates the percentage of sunny days in Sandanski throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Sandanski experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec31%51%49%47%53%58%76%77%54%48%32%43%
Data source: Sandanski December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sandanski in December

In Sandanski, Bulgaria, the progression of daylight throughout the year presents a captivating rhythm, reflecting the changing seasons. December, with its 9 hours of daylight, mirrors the earlier months of January and November, evoking a sense of tranquility as the year comes to a close. As winter sets in, the diminishing daylight contrasts sharply with the vibrant 15 hours experienced in the peak of June, highlighting the seasonal extremes. This gradual transition from long, sunlit days in summer to the shorter, cozy hours of winter not only marks the passage of time but also invites residents and visitors alike to embrace the unique beauty of each season.

Average Daylight Hours in Sandanski for December

The chart illustrates the variation in daylight duration in Sandanski throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 32m10h 36m11h 57m13h 20m14h 31m15h 6m14h 47m13h 45m12h 25m11h 3m9h 50m9h 13m
Data source: Sandanski daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Sandanski

In December, Sandanski experiences a mild uptick in wind, with average speeds reaching 1.7 m/s (4 mph), reminiscent of the brisk breezes of early winter and echoing the conditions seen in January. This seasonal behavior contrasts with previous months, where winds tend to remain consistently gentle, averaging between 1.3 m/s to 1.6 m/s from October to November. The smoothing trend denotes a transition from the serene calm of late autumn, nudging residents and visitors alike to embrace a cool yet invigorating air as they stroll through this picturesque Bulgarian town. December's winds offer a refreshing clarity to the landscape, enhancing the charm of Sandanski during the festive season.

Average December Wind Speed in Sandanski

The chart displays monthly wind speed patterns in Sandanski, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec1.71.61.61.51.61.51.51.51.41.31.41.7 m/s
Data source: Sandanski December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Sandanski Compares to Other Months

Weather in Sandanski varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sandanski, focusing on differences in temperature, rainfall, humidity, and UV levels.

December and January exhibit distinct differences in weather patterns, despite both being winter months. In December, temperatures range from a chilly minimum of -6°C (22°F) to a milder maximum of 14°C (58°F), with an average temperature of 4°C (40°F). The month is characterized by considerable precipitation, totaling 111 mm (4.4 in) over 12 days, and maintaining a high humidity level of 87%. In contrast, January presents a colder scenario, with a minimum temperature plunging to -19°C (-2°F) and an average of 2°C (35°F). Although January has a maximum temperature similar to December at 14°C (57°F), it receives less precipitation, totaling 68 mm (2.7 in) over 9 days, while humidity remains slightly higher at 88%. For more detailed information, visit Sandanski weather in January.

December generally experiences milder temperatures compared to February, with an average of 4°C (40°F) and maximums reaching up to 14°C (58°F). In contrast, February can be colder, especially at night, with minimum temperatures dropping to -17°C (1°F) and an average temperature of 5°C (41°F). While December sees more precipitation at 111 mm (4.4 in) over 12 days, February has less rainfall, totaling 64 mm (2.5 in) across 10 days. Additionally, humidity levels are slightly higher in December at 87%, compared to February's 83%. For a detailed overview, you can check Sandanski weather in February.

In December, the weather tends to be quite chilly, with temperatures ranging from a minimum of -6°C (22°F) to a maximum of 14°C (58°F) and an average around 4°C (40°F). This month also sees significant precipitation of 111 mm (4.4 inches) over 12 days, coupled with high humidity at 87%. In contrast, March experiences milder temperatures, with a minimum of -13°C (8°F), an average of 7°C (45°F), and a maximum reaching up to 22°C (71°F). Although March has slightly less precipitation at 92 mm (3.6 inches) over 13 days, it features lower humidity levels at 81%. For a detailed look at what to expect, check out Sandanski weather in March.

December and April present a striking contrast in weather patterns. In December, temperatures range from a minimum of -6°C (22°F) to a maximum of 14°C (58°F), with an average temperature of 4°C (40°F). The month experiences significant precipitation at 111 mm (4.4 in) over 12 days, coupled with high humidity at 87%. Conversely, April sees a noticeable warming trend, with temperatures ranging from -4°C (25°F) to a pleasant maximum of 26°C (78°F) and averaging at 12°C (53°F). Precipitation decreases to 69 mm (2.7 in) over just 10 days, and humidity drops to 71%. For a detailed overview of weather patterns, you can refer to Sandanski weather in April.

December and May present quite different weather scenarios. In December, temperatures range from a chilly -6°C (22°F) at night to a mild 14°C (58°F) during the day, with an average temperature of 4°C (40°F). The month sees about 111 mm (4.4 in) of precipitation spread over 12 days, accompanied by high humidity levels of 87%. In contrast, May enjoys much warmer conditions with temperatures ranging from a comfortable 4°C (39°F) at night to a warm 30°C (86°F) during the day, averaging 17°C (62°F). Precipitation drops to 73 mm (2.9 in) over just 11 days, and humidity decreases to a more moderate 74%. For more detailed weather information in May, you can check out Sandanski weather in May.

December and June present a stark contrast in weather conditions. In December, temperatures range from a chilly -6°C (22°F) to a mild 14°C (58°F), with an average of 4°C (40°F). This month is characterized by higher humidity at 87% and substantial precipitation, totaling 111 mm (4.4 in) over 12 days. In contrast, June enjoys much warmer temperatures, with a minimum of 6°C (43°F), an average of 20°C (69°F), and maximums reaching up to a sweltering 35°C (96°F). Although June has more days of precipitation (15), it sees significantly less rainfall, at 70 mm (2.8 in), and a much lower humidity level of 63%. For more details on June weather, check out Sandanski weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures range from a chilly -6°C (22°F) to a maximum of 14°C (58°F), averaging around 4°C (40°F). The month is characterized by significant precipitation, totaling 111 mm (4.4 in) over 12 days, and high humidity at 87%. In contrast, July boasts much warmer temperatures, with a minimum of 12°C (54°F) and a maximum reaching 37°C (98°F), averaging 23°C (74°F). Precipitation is also lower in July, with only 50 mm (2.0 in) over just 7 days, and humidity levels are more comfortable at 60%. For more details on July's climate in Sandanski, you can refer to this link: Sandanski weather in July.

December and August present starkly contrasting weather patterns. In December, temperatures range from a chilly -6°C (22°F) to a maximum of 14°C (58°F), with an average of only 4°C (40°F). This month experiences significant precipitation, totaling 111 mm (4.4 in) over approximately 12 days, coupled with high humidity levels at 87%. In contrast, August boasts a much warmer climate with temperatures between a minimum of 9°C (49°F) and soaring to 38°C (100°F), averaging around 24°C (75°F). Precipitation is minimal during this month, with only 31 mm (1.2 in) falling over just 6 days and humidity levels dropping to a comfortable 47%. For more details on the weather in August, you can check Sandanski weather in August.

December weather is significantly colder and wetter compared to September. In December, temperatures range from a brisk minimum of -6°C (22°F) to a maximum of 14°C (58°F), with an average temperature of only 4°C (40°F). Additionally, the month sees a substantial amount of precipitation at 111 mm (4.4 in), spread over 12 days, accompanied by high humidity levels at 87%. In contrast, September experiences much milder conditions with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 33°C (92°F) and an average of 19°C (67°F). Rainfall in September is also minimal at just 32 mm (1.3 in) over four days, with a lower humidity of 57%. For more detailed information about September weather specifics, you can check Sandanski weather in September.

December weather is markedly colder than in October, with temperatures ranging from a frigid minimum of -6°C (22°F) to a mild maximum of 14°C (58°F), averaging around 4°C (40°F). In contrast, October experiences much more moderate temperatures, with a minimum of 0°C (33°F) and a maximum of 27°C (81°F), leading to a comfortable average of 13°C (57°F). Additionally, December sees significantly higher precipitation (111 mm or 4.4 in) over more days (12) compared to October’s 56 mm (2.2 in) over just 6 days, and the humidity levels are also higher in December at 87%, compared to October's 76%. For a more detailed insight into October weather, you can check Sandanski weather in October.

In December, the weather takes on a chillier demeanor compared to November, with average temperatures dropping from 9°C (48°F) in November to 4°C (40°F) in December. The minimum temperatures in December can plummet to -6°C (22°F), whereas November sees slightly milder lows at -5°C (23°F). Additionally, December experiences more precipitation, measuring 111 mm (4.4 in) over 12 days, compared to November's 76 mm (3.0 in) across 10 days. Humidity levels are also slightly higher in December at 87%, compared to November's 85%. This contrasts the relatively warmer days of November, which can reach a maximum of 23°C (74°F), making December feel markedly colder. For more detailed insights into November's weather, visit Sandanski weather in November.

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Conclusion: What to Expect From December Weather in Sandanski

As December unfolds in Sandanski, the weather reflects a distinct chill compared to the milder months that precede it. Temperatures dip, bringing a notable shift from the warmer autumn days, with a tapestry of cooler days and crisp nights making their presence felt. This month is characterized by an increase in precipitation, with more frequent rainy days, contributing to the lush, vibrant landscape that is a hallmark of the region. Despite the cooler temperatures and heightened rainfall, the air retains a refreshing humidity level, creating a unique winter ambiance. For a deeper dive into Sandanski's weather patterns throughout the year, visit Sandanski Climate.